* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
//   头部
header {
  position: relative;
  width: 100%;
  .head {
    width: 62.6667vw;
    height: 11.7333vw;
    margin: 0 auto;
    text-align: center;
    line-height: 11.7333vw;
    h2 {
      font-size: 4.2667vw;
    }
  }
  i {
    font-size: 7.2vw;
    color: #000000;
    position: absolute;
    left: 2.6667vw;
    top: 3.6667vw;
  }
}
